Glorifying and magnifying Allah on the journey

 214. Jabir (RA), said: Whenever we went up a hill we would say Allaahu 'Akbar (Allah is the Most Great) and when we descended we would say Subhaanallaah (Glory is to Allah).

Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 6/135.